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<br />1 <br /> <br />1 <br /> <br />San Luis Project Plisse n Raise 1 Expansion - Pinal ConaWCtion Report <br />Liner subgradelsoil liner placement and compaction was completed on November 3, 1993 and <br />received final acceptance on November 5, 1993. Liner cover placement of 57 acres was completed <br />on December 7, 1993 following several delays due to snow and ice accumulation on the liner. <br />Final conformance testing was performed by SRK and the liner cover material was accepted by <br />BIv1RI and SRK. Liner cover QA/QC test results are presented in Appendrz C. <br />4.2 Liner <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />The synthetic liner contractor, Serrot Corporation, mobilized to the site on August 13, 1993. <br />VLDPE liner deployment and cean,ing began on August 16, 1993. All 57 acres of synthetic liner <br />were approved and accepted by the BMRI and SRK on November 24, 1993. The limits of <br />wmpleted and accepted VLDPE liner are depicted on Drawing 14719-1U2. Liner conformance <br />certifications and the results of QA/QC testing by SRK of the seaming operations are presented in <br />Appendix D. <br />5.0 FIELD MODIFICATIONS <br />5.1 General <br />As is common on most construction projects and provided for in Section 7.5 in the Earthwork <br />Specifications (Appendu F of the July 13, 1993 Phase II, Raise 1 Design Report) and Section 3.5 <br />of the Liner Specifications (Appendix G of the July 13, 1993 Phase II, Raise :l Design Report), <br />modifications and additions to the plans and specifications for the work were required during the <br />construction operations. These modifications do not alter the operation or function of the facility. <br />All modifications have received the Engineer's and Owner's review and approval. <br />' The following sections describe the various field engineering decisions which occurred during <br />construction of the tailings area expansion. Only field changes to the approved Permit Amendment <br />' and July 13, 1993 Phase II, Raise 1 Design Report are discussed. Detailed technical discussions <br />of these field changes aze presented in the Conswction Status Report. <br /> <br />' ar s ~e~t e. <br /> <br />